Method and means to assemble a building board on a support

ABSTRACT

A method to safely mount a building board on a bedding, so that the front surface of the boarding does not get penetrated during the time glue applied between the board and the bedding is curing or getting stiff. The method is characterized in that friction increasing elements are applied at the bedding in connection to its lower part, that glue is applied to the bedding, preferably in the shape of a string, that the board is fit up against the bedding and adjusted, and then a force is applied on the lower part of the boarding at the position of rearward arranged friction increasing elements such that these element are activated and penetrate the rear surface of the board and assist in holding the whole weight of the board.

The present invention relates to a method and means to mount a building board on a bedding, more precisely to safely hold a building board on the bedding during the time necessary for glue applied between the board and the bedding to cure or to get stiff.

PRIOR ART

Today building boards of different materials and sizes are used in building sites in a great extend. The reason for this is the possibility to obtain a smooth and as far as possible “ready” surface, i.e. a surface that needs a minor extra work prior to painting or paper-hanging. Usual materials is e.g. plaster, chips, wooden particles, composite, cement and materials based on glass. These are used for covering or as support for other materials in or onto floors, walls and ceilings. The support can be of steel or wood, or of a combination of these materials, but also a wall of concrete or a plastered surface or the like can be covered by a building board. The most frequent building technique using building boards is in so called light buildings using a frame work of wood and/or steel. Joists in the frame work are mounted vertically with a c/c of 450/600 mm on, over and below joists, (rails) and will form a building framework. Frames for the ceiling and floor are mounted in a similar way. After that the boards are most often mounted by screwing. Frequently used building boards are of plaster and having a width of 900/1200 mm and a length of 2400/2500 mm. It takes about 50 screws to mount a board, The screwing of plaster boards is time consuming and demands a great deal of work. The screw heads must be drawn so far into the building board that they do not leave any bumps on the board surface, but the smoothness of said surface must be re-established by putty up the depressions of screw heads and board joints. Here there is a risk that the screw thread will crush the gypsum paste, which will jeopardize the force acting onto the board(s). As a consequence of the monotone and repeated working sequences during screwing, it can be mentioned that just 2-3% of the person's daily working with wall mounting are able to work till retirement. A wall mounting worker will handle about seven boards each hour, each board is screwed with 50 screws, which will result in 350 monotone moments performed each hour and that 2800 moments are performed each working day. Common injuries are in shoulders, neck and back. Whitening fingers caused by vibrations from the screwing machines are also common. When screwing through the boards an initially smooth surface is penetrated and must be treated afterwards e.g. by filling. Lately boards have been glued at the same time as the amount of screws has been decreased to make it easier for the workers. Thus, screws do not have to be used to keep the board in position during curing of the glue, which often is water based. Still the problem with a damaging influence on the outer surface of the board remains.

There have also been efforts made to use double adhesive tapes. The disadvantage using tapes is that the boards cannot be properly adjusted during mounting. Thus this method is not used in an significant scale.

THE PURPOSE OF THE INVENTION

The outer most purpose of the present invention is to obtain a technique which essentially will decrease the need for an after treatment of a mounted building board. More precisely the purpose of the invention is to suggest a technique which is useful to properly hold the building boards towards an at least partly glue covered bedding during curing of the glue. This is performed without the need of penetrating attachment means on the front surface of the board. This technique makes it possible to use building boards with a completed finished surface which will result in many advantages of both economically and time saving kind.

An other purpose of the invention is to suggest a technique making it possible to build several onto each other arranged layers of building boards to form a strong monocoque construction and without the joints of the boards being positioned above a rear frame work joist.

Yet another purpose of the present invention is to obtain a possibility to hold building boards towards hard and/or uneven bedding during the time it takes for a glue to cure.

Still an other object of the present invention is to suggest a technique which will accelerate the curing of applied glue.

The purposes above are obtained by the present invention by a method and means having the characterising clauses mentioned in the claims.

GENERAL DESCRIPTION OF THE ADVANTAGES OF THE INVENTION

By using means to hold the building board safely against the bedding and which means does not influence to outer surface of the board during the time when an applied glue on the bedding is curing, the front surface of the board will be intact and thus without any need of after treatment.

The lateral force to be exerted onto a vertical board placed on a bedding has to be as big to create a friction grip with the bedding which will hold the weight of the board.

By the invention an improvement of the friction force is suggested by using separate friction devices or pins, here called “pin anchor” which preferably are mountable onto a lower rail by clips in connection to a vertical joist and which pin anchor has at lest one pin element directed outwards. This or these pin anchors may, after having been activated, take the whole or at least a major part of the weight of the board. Thus this will stop the board from sliding after being applied onto glued bedding. This means that less aggressive and less quick adhering glue may be used, i.e. a glue admitting certain after adjustment of the board if necessary. The pin anchors can also be used and attached to e.g. a concrete wall by using e.g. tape or gluing. Also other attachments methods can be used. There are pin anchor of different types dependent of which board material to be anchored and at which bedding this shall be performed. The density of the board material and the character of the bedding and also the material in the pin anchor have an influence of the attachment and the method of anchoring, both of the pin anchor itself in the bedding and of the attachment between the pin anchor and the board. However, this is something that the man skilled in the art can find out with guidance of what is presented here. Common for a pin anchor is that it has at least one penetrating means being able to penetrate the rear surface of the board a distance being less than the thickness of the board. The pin anchor will facilitate a mounting of the board on the bedding by admitting the worker to fit up the board onto the bedding and adjust it at the same time as it is brought upwards. At a correct position the worker will press the lower part of the board with his foot in a direction perpendicular to the bedding such that at least one pin anchor in connection to the bedding is activated by having its pin means penetrating the rear surface of the board and thus assist in holding the whole weight of the board.

A transverse force to hold and press the board towards the glued bedding during the curing of the glue is created by using magnetic means cooperating with a magnetic material in connection to the bedding or constituting the bedding in form of a steel joist or rail. It is also possible to arrange inserts of magnetic material in e.g. girders of wood. It is also possible to glue/nail/screw/tape a magnetic material on the bedding if this is a wood frame, a concrete wall, or another building board. Different arrangements with magnetic means and holder for these means can be used within the scoop of the invention. The force executed to hold the building board is dependent of the magnetic flow passing through the board which in turn is dependent of the size and to a certain extent of the shape of the magnetic material at the bedding. In the case the glue is of a heat curable kind a hysteris influence can be created by using electro magnets, which will create heat in the magnetic bedding and thus will speed up the curing. It is also possible to create heat by vibrations, or use glue being cured by being exposed to vibrations.

By using rulers carrying magnetic devices along its length an evenly distributed force pressing the board towards the bedding is possible to obtain. Glue is applied on the bedding by use of e.g. a battery powered joint ejector. Several alternative devices for applying glue being environment friendly, quiet and efficient are to be found on the market. The glue can also be enveloped in different ways depending upon equipment and working site, (tube/folie, can/barrel).

Preferably the pin anchor is used when the magnetic rulers are to be reused more frequently. Thus this will decrease the amount of rulers necessary on a working site.

Thus the glue has just to get stiffen and not cure to establish a sufficient holding force between the bedding and the board. From a handling point of view the magnetic rulers may be arranged with a telescopic function. Dependent upon the choice of glue, air humidity and temperature the magnetic rulers will now press the board against the bedding until the glue is stiffened/cured. When this has happened they will be removed and may be reused. There may be advantages in using this method. The mounting is almost soundless/free from vibrations and gives the workers a good working environment with very low stress on the body. No filling of screw heads saves time and money. Further the method opens the market for a new type of more refined boards as the outer surface of the boards does not need to get damaged.

With special glues, and if outer circumstances admit it, the mounting of boards may take place just using pin anchors and glue.

SUMMARIZE OF FIGURES

The inventions shall now be described in connection to embodiments shown in the accompanying drawings, where;

FIG. 1 is a diagrammatic view of a vertical frame work prepared for being applied with glue, and with pin anchors mounted and being shown in separate part views;

FIG. 2 is a view similar to FIG. 1, now with glue strings applied;

FIG. 3 is a diagrammatic view showing how a board is placed on the frame work and under pressure against the ceiling;

FIG. 4 is a view according to FIG. 3, now with the board pressed against the bedding and how a pressure is applied below to the board to activate the rear pin anchor.

FIG. 5 shows the application of magnetic rulers on the board at positions above the rear frame work joists and how magnets recessed in the ruler can be arranged.

FIG. 6 is a diagrammatic view of two boards mounted on the frame work bedding and with applied magnetic strips.

SPECIFICATION

In FIG. 1 a diagrammatic view of a vertical frame work prepared for being applied with glue and with pin anchors mounted is shown. The frame work has vertical joists 2 and lower 3 and upper rails 4. On the lower rail 3 there is mounted a pin anchor A. From the part views it can be seen that the pin anchor A is in the form of a “clip” with two pin means B.

In FIG. 2 a frame work with glue strings is shown and FIG. 3 shows how the board is applied on the bedding, and where an applied force, shown by the arrow F in FIG. 4, is activating rear pin means.

In FIG. 5 there is shown how a magnetic ruler 5 is placed on the board in connection to a rear frame work including or consisting of a magnetic material. In FIG. 6 is shown how several rulers are arranged on the building board in a non damaging way.

The invention is not restricted to the examples given above, but modifications can be made within the scoop of the following claims. 

1-8. (canceled)
 9. A method to mount a board on a at least partly magnetic bedding, whereby the anchoring against the bedding takes place when a glue applied on the bedding is cured, characterized in that magnetic means are applied on the front surface of the building board in connection to rearward arranged magnetic material at the bedding, whereby the magnetic fields from said magnetic means are passing through the building board and said magnetic material at the bedding, or constituting the bedding, e.g. in the shape of a steel joist and thereby performing a force acting on the board and create a pressure on the bedding.
 10. A method according to claim 9, characterized in that electromagnets are used and that these will create a magnetic hysteresis effect to heat a metallic bedding onto which the curable attachment agent is applied.
 11. Means to temporary hold a building board towards a bedding to fix it during the time when an attachment agent is cured, and to perform the method according to claim 9, characterized in magnetic means being able to apply on the outer surface of the building board.
 12. Means according to claim 11, characterized in that, expect from the magnetic means, there are also UV emitters arranged at the rulers. 